From: Andreas Pfefferle ap@denx.de
Signed-off-by: Andreas Pfefferle ap@denx.de --- drivers/rtc/Makefile | 1 + drivers/rtc/rtc4543.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++++ include/rtc.h | 4 ++ 3 files changed, 112 insertions(+), 0 deletions(-) create mode 100644 drivers/rtc/rtc4543.c
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 94bc518..6adece2 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -55,6 +55,7 @@ COBJS-$(CONFIG_RTC_MPC8xx) += mpc8xx.o COBJS-$(CONFIG_RTC_PCF8563) += pcf8563.o COBJS-$(CONFIG_RTC_PL031) += pl031.o COBJS-$(CONFIG_RTC_RS5C372A) += rs5c372.o +COBJS-$(CONFIG_RTC_RTC4543) += rtc4543.o COBJS-$(CONFIG_RTC_RX8025) += rx8025.o COBJS-$(CONFIG_RTC_S3C24X0) += s3c24x0_rtc.o COBJS-$(CONFIG_RTC_X1205) += x1205.o diff --git a/drivers/rtc/rtc4543.c b/drivers/rtc/rtc4543.c new file mode 100644 index 0000000..d2a6240 --- /dev/null +++ b/drivers/rtc/rtc4543.c @@ -0,0 +1,107 @@ +/* + * (C) Copyright 2008 + * Andreas Pfefferle, DENX Software Engineering, ap@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <asm/io.h> +#include <common.h> +#include <command.h> +#include <config.h> +#include <bcd.h> +#include <rtc.h> + +#if defined(CONFIG_RTC_RTC4543) && defined(CONFIG_CMD_DATE) + +int rtc_get(struct rtc_time *tmp) +{ + int rel = 0; + uchar sec, min, hour, mday, wday, mon, year; + + rtc_read(0x00); + sec = rtc_read(0x01); + min = rtc_read(0x02); + hour = rtc_read(0x03); + wday = rtc_read(0x04); + mday = rtc_read(0x05); + mon = rtc_read(0x06); + year = rtc_read(0x07); + rtc_read(0x08); + + debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x " + "hr: %02x min: %02x sec: %02x\n", + year, mon, mday, wday, + hour, min, sec); + + if (sec & 0x80) { + puts("### Warning: RTC Low Voltage - date/time not reliable\n"); + rel = -1; + } + + tmp->tm_sec = BCD2BIN(sec & 0x7F); + tmp->tm_min = BCD2BIN(min & 0x7F); + tmp->tm_hour = BCD2BIN(hour & 0x3F); + tmp->tm_mday = BCD2BIN(mday & 0x3F); + tmp->tm_mon = BCD2BIN(mon & 0x1F); + tmp->tm_year = BCD2BIN(year); + tmp->tm_wday = BCD2BIN(wday & 0x07); + tmp->tm_yday = 0; + tmp->tm_isdst = 0; + + debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", + tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, + tmp->tm_hour, tmp->tm_min, tmp->tm_sec); + + return rel; +} + +int rtc_set(struct rtc_time *tmp) +{ + debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", + tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, + tmp->tm_hour, tmp->tm_min, tmp->tm_sec); + + rtc_write(0x00, 0); + rtc_write(0x01, BIN2BCD(tmp->tm_sec)); + rtc_write(0x02, BIN2BCD(tmp->tm_min)); + rtc_write(0x03, BIN2BCD(tmp->tm_hour)); + rtc_write(0x04, BIN2BCD(tmp->tm_wday)); + rtc_write(0x05, BIN2BCD(tmp->tm_mday)); + rtc_write(0x06, BIN2BCD(tmp->tm_mon)); + rtc_write(0x07, BIN2BCD(tmp->tm_year % 100)); + rtc_write(0x08, 0); + + return 0; +} + +void rtc_reset(void) +{ + struct rtc_time tmp; + tmp.tm_sec = 0; + tmp.tm_min = 0; + tmp.tm_hour = 0; + tmp.tm_wday = 4; + tmp.tm_mday = 1; + tmp.tm_mon = 1; + tmp.tm_year = 1970; + rtc_set(&tmp); +} + +#endif diff --git a/include/rtc.h b/include/rtc.h index 785fbe3..019c2eb 100644 --- a/include/rtc.h +++ b/include/rtc.h @@ -61,4 +61,8 @@ void to_tm (int, struct rtc_time *); unsigned long mktime (unsigned int, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int);
+uchar rtc_read(uchar reg) __attribute__((weak)); +void rtc_write(uchar reg, uchar val) __attribute__((weak)); + + #endif /* _RTC_H_ */